<template>
  <div class="wrapper">
    <swiper
      :options="swiperOption"
      v-if='showSwiper'
    >
      <swiper-slide
        v-for="item of list"
        :key="item.id"
      ><img
          class="swiper-img"
          :src='item.imgUrl'
        ></swiper-slide>
      <div
        class="swiper-pagination"
        slot='pagination'
      ></div>
    </swiper>
  </div>

</template>

<script>
export default {
  name: 'HomeSwiper',
  props: {
    list: Array
  },
  data () {
    return {
      swiperOption: {
        pagination: '.swiper-pagination',
        loop: true,
        autoplay: false
      }
    }
  },
  computed: {
    showSwiper () {
      return this.list.length
    }
  }
}
</script>

<style lang='stylus' scoped>
// 样式穿透，不止在当前组件起作用
.wrapper>>>.swiper-pagination-bullet-active {
  background: #fff;
}

.wrapper {
  overflow: hidden;
  width: 100%;
  height: 0;
  padding-bottom: 30.5%; // 父元素宽度的31.25%
  background: #eee;

  .swiper-img {
    width: 100%;
  }
}
</style>
